It exists.So what happens to Zen 4?
DT/mobile Zen4 dies yeah.Do they stop making Zen 4 chips immediately or are they supposed to slot in below the Zen 5 SKUs for more pricing options for consumers?
It was explained that SPEC int rate was referred to. The claims which primarily irritated some readers were about 1-threaded 1-copy SPEC int rate.one can always in hindsight claim that some specific benchmark was being referred to (but wasn't mentioned explicitly!)
Ok, and what was the claimed performance increase for that benchmark, and which CPUs where being compared?It was explained that SPEC int rate was referred to.
Core for core Zen5 is >40% faster than Zen4 in SPEC.Ok, and what was the claimed performance increase for that benchmark, and which CPUs where being compared?
So what happens to Zen 4? Zen 3 is still being manufactured I suppose? Do they stop making Zen 4 chips immediately or are they supposed to slot in below the Zen 5 SKUs for more pricing options for consumers?
INT or FP?Core for core Zen5 is >40% faster than Zen4 in SPEC.
I am a technewb, please tell me why. Is integer used by more programms?INT or FP?
Would be more interesting if that is INT
Yes. All programs use integer math (for pointers if nothing else), only some use fp. More than that, we can expect well parallelized fp (which spec has plenty of) to get a major boost, because simd execution width is doubled.Is integer used by more programms?
INT or FP?
Would be more interesting if that is INT
I don't read twitter, but it seems there was an update posted:The cache amounts are wrong for some of these, Zen 5C cores have a fraction the L3 available to them.
EDIT: Actually, there's probably a lot more wrong than that. Wouldn't make sense for there to be only one 500W SKU.
Yeah, 40% was Zen 1 initial target (which they beat by actually achieving 52%).INT is what most people care about. Both single thread and multi-thread.
If it is really > 40% single thread, it would be truly mind blowing performance gain.
Yeah, 40% was Zen 1 initial target (which they beat by actually achieving 52%).
As full "breaking, ground-up redesigns" of CPU's usually take at least ~5-7 years, I was hoping (ever since that famous Mike Clark interview) that Zen 5 would be it - with targets as aggressive as Zen 1. Containing all the results of the higher-risk / more conceptual research AMD has been doing ever-since 2017.
As beating Zen 4 by that amount (particularly on a similar node) is an insanely harder achievement than "clubbing baby dozer-cores", i'm still very sceptical ...
... but boy do I want to believe
You weren't supposed to say that, little one.Core for core Zen5 is >40% faster than Zen4 in SPEC.
Well no, that's more of a willpower thing.Zen 5 team was not under the same financial pressure, and could pursue all of the avenues that looked promising, even more risky ones.
Oh no! NDA breach! We'll miss you, KeplerYou weren't supposed to say that, little one.
It was explained that the figure is from the aggregate SPEC score (which is calculated from the subscores).IPC increase for Zen 5 > 40% What does this refer to? Is this the average of the IPC growth curve? Up to 40-50%?
It's easy to throw around such numbers, but if there is no reference point and what type of load these numbers refer to, they don't tell us anything. It is equally easy to write that Zen 5 has an IPC >6%. And what does this tell us? Nothing.
Zen 3 with one specific workload (SPEC?) saw +106% compared to Zen 2. However, in the case of AMD slide, the IPC growth curve ends at +39% with an average of +19%.
The statement concerns core-to-core performance. That metric doesn't really equal to IPC.IPC increase for Zen 5 > 40% What does this refer to?
It really does, those cores already sit high 5s and can't really go much further wrt clkspeed.That metric doesn't really equal to IPC.
IPC? 19 and 13% respectively.So how much did Zen 3 gain in SPEC over Zen 2 and Zen 4 over Zen 3?
Double jeopardy event for Intel compared to their embarrassment with Zen 3!
Yeaaaa let's just say IDC needs something far meaner than LNC to compete.Double jeopardy event for Intel compared to their embarrassment with Zen 3!
+19% and +13% are the average of the IPC growth curve from programs and games. I asked about the SPEC result.IPC? 19 and 13% respectively.
The SPEC results are the exact same lmao.+19% and +13% are the average of the IPC growth curve from programs and games. I asked about the SPEC result.
AMD SPEC results translate into averages in just a truly wonderful fashion.+40% for Zen 5 is certainly not average
You're shadowboxing stuff.On average IPC +40%, i.e. a curve from approximately +10-15 to 70-90%? Oh, it's going to be a disappointment.